Printing machine

Abstract

Two ink rolls in a flexographic printing machine are disclosed with a pivoted connection of the ink roll mounting elements such that one or other of the ink rolls may be engaged with the print cylinder.

What is claimed is: 
     
       1. A printing machine comprising: (a) at least one printing cylinder;   (b) first and second ink rolls mounted adjacent first and second portions of said cylinder;   (c) pivoted mounting means for alternatively engaging said first and second ink rolls with said printing cylinder;   (d) an ink tray; and   (e) slidable support means secured to said pivoted mounting means for slidably supporting said ink tray between a first position in contact with said first ink roll and a second position in contact with said second ink roll.   
     
     
       2. A printing machine comprising: (a) at least one printing cylinder;   (b) first and second ink rolls mounted adjacent first and second portions of said cylinder;   (c) pivoted mounting means for alternatively engaging said first and second ink rolls with said printing cylinder, said pivoted mounting means comprising an elongated support element having spaced-apart ends, said elongated support element being pivotally mounted for arcuate movement of said ends of said elongated element, and said first and second ink rolls being supported at the ends of said elongated element;   (d) fluid actuated means, means connecting said fluid activated means to said elongated support element for pivoting said support element for engaging one or other of said ink rolls with said printing cylinder;   (e) an ink tray; and   (f) slidable support means for moving said ink tray from a first position adjacent said first ink roll to a second position adjacent said second ink roll.   
     
     
       3. The printing machine of claim 2 including fluid expandable means for moving said ink tray toward and away from said printing cylinder. 
     
     
       4. In a flexographic printing machine the invention comprising: (a) at least one rotary printing cylinder carrying a flexographic printing plate;   (b) ink roll means consisting of a pair of first and second ink rolls;   (c) vertically extending plate members;   (d) first and second means mounting said first and second ink rolls on said vertically extending plate members;   (e) pivot means mid-way between said first and second ink rolls for securing said plate member to the machine for pivoting said first and second ink rolls into and out of contact with said rotary print cylinder; and   (f) a single ink tray means for alternatively engaging each of said first and second ink rolls.   
     
     
       5. The flexographic printing machine of claim 4 further including support means for supporting said single ink tray means for alternatively engaging each of said first and second ink rolls. 
     
     
       6. The flexographic printing machine of claim 5 wherein said support means comprise first support means connected to said plate member, and second support means connected to said ink tray and slidably mounted on said first support means.